swaygrab: Add --help option that prints usage

1 files changed, 3 insertions, 1 deletions

diff --git a/swaygrab/main.c b/swaygrab/main.c
index 90d118e2..ae17155f 100644
--- a/swaygrab/main.c
+++ b/swaygrab/main.c
@@ -127,6 +127,7 @@ int main(int argc, char **argv) {
         init_log(L_INFO);
 
         static struct option long_options[] = {
+                {"help", no_argument, NULL, 'h'},
                 {"capture", no_argument, &capture, 'c'},
                 {"version", no_argument, NULL, 'v'},
                 {"socket", required_argument, NULL, 's'},
@@ -138,6 +139,7 @@ int main(int argc, char **argv) {
         const char *usage =
                 "Usage: swaygrab [options] <output> [file]\n"
                 "\n"
+                "  -h, --help             Show help message and quit.\n"
                 "  -c, --capture          Capture video.\n"
                 "  -v, --version          Show the version number and quit.\n"
                 "  -s, --socket <socket>  Use the specified socket.\n"
@@ -147,7 +149,7 @@ int main(int argc, char **argv) {
         int c;
         while (1) {
                 int option_index = 0;
-                c = getopt_long(argc, argv, "cvs:r", long_options, &option_index);
+                c = getopt_long(argc, argv, "hcvs:r", long_options, &option_index);
                 if (c == -1) {
                         break;
                 }